Susie Kellner (aka Zsuzsa Kellner) is a fitness competitor and fitness model from Hungary. She stays pretty active in the internet world, doing tons of guest posing and fitness events. She has a very lean-looking physique, and obviously takes a very disciplined approach to training and diet. I don’t think I’ve ever seen her in “off-season” condition. The fitness model diet is substantially different than a fitness or figure competition diet, the the transition seems to be an easy one for Susie.